By churning the Ocean of Milk, Ajita produced nectar for the demigods. In the form of a tortoise, He moved here and there, carrying on His back the great mountain known as Mandara.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
पयोधिं येन निर्मथ्य सुराणां साधिता सुधा । भ्रममाणोऽम्भसि धृतः कूर्मरूपेण मन्दरः
payodhiṃ yena nirmathya surāṇāṃ sādhitā sudhā | bhramamāṇo'mbhasi dhṛtaḥ kūrmarūpeṇa mandaraḥ
SB 8.5.10